Question

which term of an AP: 5.10.15, 20__-175​

Answer 1

Step-by-step explanation:

d= 5

second last term = -170

Answer 2

Answer:

a=5

d=-5

an=-175

n=?

Step-by-step explanation:

we know that,

an=a+(n-1)d

-175=5(n-1)-5

-175-5=(n-1)5

-180=(n-1)5

-180/5=n-1

-36=n-1

-36+1=n

-35=n

Therefore -35th term of an AP: 5.10.15, 20_ is -175.